HELP WOULD BE APPRECIATED Solve for n

n - 21 = 3

OA) n=45

OB) n=52

Oc) n= 24

OD) n= 19​

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?